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f5a889e40c
This allows e.g. utils.utils.run_async to offload long-running functions to a completely different subprocess entirely, offering real parallelism. Implementation is still experimental, notably not all objects can be transferred safely across the wire; also there is no concept of updating caches yet - so adding an object from the subprocess side will not be known in the main thread yet (since caches cannot yet tell the underlying database has changed).
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""
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some utilities
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"""
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import os
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import sys
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import __main__
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from twisted.python.filepath import FilePath
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from twisted.python.reflect import namedAny
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# from twisted.python.modules import theSystemPath
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def findPackagePath(modulePath):
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"""
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Try to find the sys.path entry from a modulePath object, simultaneously
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computing the module name of the targetted file.
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"""
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p = modulePath
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l = [p.basename().split(".")[0]]
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while p.parent() != p:
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for extension in ['py', 'pyc', 'pyo', 'pyd', 'dll']:
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sib = p.sibling("__init__."+extension)
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if sib.exists():
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p = p.parent()
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l.insert(0, p.basename())
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break
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else:
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return p.parent(), '.'.join(l)
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def mainpoint(function):
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"""
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Decorator which declares a function to be an object's mainpoint.
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"""
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if function.__module__ == '__main__':
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# OK time to run a function
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p = FilePath(__main__.__file__)
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p, mn = findPackagePath(p)
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pname = p.path
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if pname not in map(os.path.abspath, sys.path):
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sys.path.insert(0, pname)
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# Maybe remove the module's path?
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exitcode = namedAny(mn+'.'+function.__name__)(sys.argv)
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if exitcode is None:
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exitcode = 0
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sys.exit(exitcode)
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return function
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